孔隙结构特征研究是储层评价的重要内容。采用铸体薄片、扫描电镜、铸体图像分析、压汞分析等多种技术手段，对准噶尔盆地红山嘴地区三叠系克下亚组储层的孔隙结构进行了系统分析与研究。克下亚组储层以次生溶蚀孔隙为主，喉道类型为片状或弯片状，主要是Ⅲ类中等喉道，其次是Ⅳ类细喉。储层评价结果为克下亚组主要发育Ⅲ—Ⅳ类中等—差储层。沉积作用和成岩作用是影响孔隙结构的主要因素，其中胶结作用和溶蚀作用的影响最大。

The cast thin section, scanning electronic microscope, cast image analysis and mercury injection analysis are applied to analyze the pore structure of the Lower Karamay Formation reservoir in Hongshanzui area. The main pore type of the Lower Karamay Formation reservoir is secondary dissolved pore. The throat type is lamellar or curved lamellar, mainly of moderate and fine throat. The Lower Karamay Formation is mainly composed of type Ⅲ-Ⅳ reservoirs. The main influencing factors of the pore structure are sedimentation and diagenesis, and the cementation and dissolution are dominant factors.